The $620 million refurbishing of the San Diego Trolley’s Blue and Orange lines begins with the closing of Blue Line stations at San Ysidro, Beyer Boulevard and Iris Avenue this weekend.

The stations will close at 9:30 p.m. on Friday. Regular Trolley service will resume on Monday.

The Metropolitan Transit System is providing shuttle buses to offset the closed stations.

The “Trolley Shuttle” will serve the stations at Palm Avenue, Iris Avenue, Beyer Boulevard and the San Ysidro Transit Center.

The “Trolley Express” will provide nonstop station-to-station service between the San Ysidro Transit Center and Palomar Street Trolley Station.

The shuttle buses will run every 8-15 min. during normal hours of Trolley operation.

MTS is encouraging riders to arrive early and plan for delays during the construction.

The Trolley Renewal Project will be upgrading tracks, crossings, signaling and stations along the Blue and Orange Lines during the next few years. The project includes the purchase of 57 “low-floor” trolleys which are expected to improve accessibility and boarding times.

Information is available online or by calling the Trolley Renewal Hotline at (619) 557-4533.